AD7329 Analog Devices, AD7329 Datasheet - Page 34

• Manufacturer Part Number: AD7329
• Description: 1 MSPS , 8-Channel, Software Selectable True Bipolar Input, 12-Bit Plus Sign A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7329

• Resolution (bits): 13bit
• # Chan: 8
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
• Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref),Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

AD7329
POWER VS. THROUGHPUT RATE
The power consumption of the AD7329 varies with throughput
rate. The static power consumed by the AD7329 is very low, and
significant power savings can be achieved as the throughput rate is
reduced. Figure 55 and Figure 56 show the power vs. throughput
rate for the AD7329 at a V
plots clearly show that the average power consumed by the AD7329
is greatly reduced as the sample frequency is reduced. This is true
whether a fixed SCLK value is used or if the SCLK value is scaled
with the sampling frequency. Figure 55 and Figure 56 show the
power consumption when operating the device in normal mode
for a fixed 20 MHz SCLK and a variable SCLK that scales with
the sampling frequency.
12
10
8
6
4
2
0
0
Figure 55. Power vs. Throughput Rate with 3 V V
100
200
300
THROUGHPUT RATE (kSPS)
CC
400
20MHz SCLK
of 3 V and 5 V, respectively. Both
500
600
V
V
T
INTERNAL REFERENCE
700
A
CC
DD
VARIABLE SCLK
= 25°C
= 3V
= 12V, V
800
900 1000
SS
= –12V
CC
1100
Rev. A | Page 34 of 40
20
18
16
14
12
10
8
6
4
2
0
0
Figure 56. Power vs. Throughput Rate with 5 V V
100
200
300
THROUGHPUT RATE (kHz)
400
500
VARIABLE SCLK
600
V
V
T
INTERNAL REFERENCE
CC
DD
A
= 25°C
= 5V
= 12V, V
700
20MHz SCLK
800
SS
= –12V
CC
900
1000